---
product_id: 394240413
title: "COLLOIDAL SILICA - 5.5 OZ"
brand: "west system"
price: "$225"
currency: NZD
in_stock: true
reviews_count: 6
category: "West System"
url: https://www.desertcart.nz/products/394240413-colloidal-silica-5-5-oz
store_origin: NZ
region: New Zealand
---

# Enhances epoxy strength Viscosity control precision Prevents runoff on vertical surfaces COLLOIDAL SILICA - 5.5 OZ

**Brand:** west system
**Price:** $225
**Availability:** ✅ In Stock

## Summary

> 🛠️ Elevate your epoxy game—thicken, strengthen, and conquer every surface with West System Colloidal Silica!

## Quick Answers

- **What is this?** COLLOIDAL SILICA - 5.5 OZ by west system
- **How much does it cost?** $225 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/394240413-colloidal-silica-5-5-oz)

## Best For

- west system enthusiasts

## Why This Product

- Trusted west system brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Clean Off-White Cure:** Achieve a neat, off-white finish that blends seamlessly with your epoxy projects.
- • **Precision Viscosity Control:** Master the perfect epoxy consistency every time with colloidal silica’s unmatched thickening power.
- • **Superior Bonding & Filleting:** Create ultra-smooth, professional-grade epoxy joints that stand out in strength and finish.
- • **Enhanced Durability & Abrasion Resistance:** Boost your epoxy’s toughness to withstand wear and tear, ensuring long-lasting results.
- • **Runoff Resistance for Vertical & Overhead Work:** Say goodbye to drips and sagging—ideal for complex, gravity-defying applications.

## Overview

West System Colloidal Silica (5.5 oz) is a premium epoxy thickening additive designed to precisely control viscosity, prevent epoxy runoff on vertical and overhead surfaces, and enhance the strength and abrasion resistance of epoxy mixtures. It cures to a clean off-white color, making it ideal for professional bonding, filleting, and fairing applications in woodworking and marine projects.

## Description

Get On The Water.

Review: West system the best - Great filler from west system A++++++
Review: This stuff works great!! It’s not easy to mix into the epoxy, it’s so insanely light, it just floats away if you’re not very very careful!! Add a little at a time, mix inside a garage or somewhere the wind can’t get to the mixing bowl. Once it’s mixed in, it does a great job thickening up the epoxy. Great for vertical surfaces as it really holds upright well once mixed to the proper thickness.

## Features

- Creates a smooth mixture, ideal for general epoxy bonding and filleting
- Prevents epoxy runoff in vertical and overhead joints.
- Used to improve strength, abrasion resistance, and consistency of epoxy fairing compounds.
- Cures to an offwhite color.
- 406 Colloidal Silica is an epoxy thickening additive used to control the viscosity of the epoxy.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B005150RUW |
| Best Sellers Rank | #62,651 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #90 in Wood Filler |
| Item model number | 406-7 |
| Manufacturer | WEST SYSTEM |
| Product Dimensions | 53.34 x 40.64 x 28.58 cm; 155.92 g |

## Product Details

- **Brand:** West System
- **Item form:** Liquid
- **Material:** Epoxy Resin
- **Specific uses for product:** Woodworking

## Images

![COLLOIDAL SILICA - 5.5 OZ - Image 1](https://m.media-amazon.com/images/I/71fv2TtXOvL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ West system the best
*by A***S on 5 December 2025*

Great filler from west system A++++++

### ⭐⭐⭐⭐⭐ Review
*by M***. on 1 May 2023*

This stuff works great!! It’s not easy to mix into the epoxy, it’s so insanely light, it just floats away if you’re not very very careful!! Add a little at a time, mix inside a garage or somewhere the wind can’t get to the mixing bowl. Once it’s mixed in, it does a great job thickening up the epoxy. Great for vertical surfaces as it really holds upright well once mixed to the proper thickness.

### ⭐⭐⭐⭐⭐ Review
*by M***E on 20 March 2024*

Works well for fairing, very strong

## Frequently Bought Together

- West System 406-7 Collodial Silica 5.5oz, off-white
- West System 105 Epoxy Resin (.98Gallon 10.3-Pounds)

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**Shop now:** [https://www.desertcart.nz/products/394240413-colloidal-silica-5-5-oz](https://www.desertcart.nz/products/394240413-colloidal-silica-5-5-oz)

---

*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-20*